PT-2026-21740 · Mozilla · Thunderbird+1

Agi Sferro + 3 · Published 2026-02-24 · Updated 2026-03-01 · CVE-2026-2807

Positive Technologies (AI Summary)

CVSS v2.0

10

Critical

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 148 Thunderbird versions prior to 148

Description The software contains memory safety bugs. Some of these bugs exhibited evidence of memory corruption, and it is presumed that, with sufficient effort, they could potentially be exploited to execute arbitrary code.

Recommendations Update Firefox to version 148 or later. Update Thunderbird to version 148 or later.

Fix

DoS

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

BDU:2026-06184

CVE-2026-2807

OPENSUSE-SU-2026:10257-1

Affected Products

Firefox

Thunderbird

References · 75

• https://mozilla.org/en-US/security/advisories/mfsa2026-13 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-2807 · Vendor Advisory
• https://mozilla.org/security/advisories/mfsa2026-16 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-2807 · Security Note
• https://mozilla.org/security/advisories/mfsa2026-13 · Vendor Advisory
• https://safe-surf.ru/specialists/bulletins-nkcki/729334 · Security Note
• https://mozilla.org/en-US/security/advisories/mfsa2026-16 · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se18-bulletin-2026-0423SE18MD · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se17-bulletin-2026-0421SE17 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-2807 · Vendor Advisory
• https://mozilla.org/en-US/security/advisories/mfsa2026-13/#CVE-2026-2807 · Vendor Advisory
• https://mozilla.org/en-US/security/advisories/mfsa2026-16/#CVE-2026-2807 · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se47-bulletin-2026-0518SE47 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-2807 · Security Note
• https://bdu.fstec.ru/vul/2026-06184 · Security Note